TN500 Portable White Light Turbidity Meter with GLP Data Logger, EPA 180.1 Compliant

Apera TN500 uses a tungsten filament lamp as the light source and 90° scattering method, which is compliant with the U.S EPA 180.1 method for the determination of turbidity in drinking, ground, surface, and saline waters, domestic and industrial wastes. The instrument is designed for water quality professionals, offering long-term reliability in high-accuracy turbidity measurement with an intuitive operation system, simple calibration, and GLP data management.
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    Measurement Method

    90° scattering measurement, U.S EPA180.1 compliant

    Light Source

    Tungsten filament lamp

    Measuring Range

    0 to 1000 NTU (FNU), automatic range switch

    0.01 to 19.99 NTU(FNU)

    20.0 to 99.9 NTU(FNU)

    100 to 1000 NTU(FNU)


    ≤ ±2% of reading+ stray light


    ≤ ± 1% of reading or 0.02 NTU(FNU) (the greater of the two)


    0.01/0.1/1 NTU (FNU)

    Stray Light

    ≤0.02 NTU (FNU)

    Calibration Standard

    AMCO Polymer or Formazin Solution:0, 20, 100, 400 and 800NTU (FNU)


    Silicon photovoltaic

    Measuring Mode

    Normal measurement and TruRead measurement

    Data Storage

    200 groups

    Data Output

    USB to PC

    Calibration Record

    Calibration date and time


    TFT color screen

    Sample Vial

    Φ25×60 mm,high borosilicate glass with lid

    Sample Vial Volume

    18 ml

    Power supply

    3.7V Rechargeable lithium battery

    Working Condition

    Temperature: 0 to 50°C(32°F to 122°F);Relative humidity:

    0 to 90% at 30°C, 0 to 80%at 40°C, 0 to 70% at 50°C, no condensation

    Instrument sealing grade



    ISO9001:2015 and CE

    Limited Warranty

    2 years

    Dimension and Weight

    Meter: (90×203×80) mm/385g

    Test Kit: (310×295×110) mm/1.5kg


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    • Quality

    We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of TWO YEARS for the instrument from the delivery.

    This limited warranty does NOT cover any issues due to:

    • Accidental damage
    • Improper use
    • Normal wear and tear
    • Transportation
    • Storage
    • Failure to follow the product instructions
    • Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
    • Unauthorized repair
    • External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
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